ZF 4475.280.213 CONNECTING SOCKET | OEM Genuine Part

Overview

The ZF 4475.280.213 CONNECTING SOCKET is a precision-engineered OEM genuine part designed to establish a secure hydraulic or pneumatic link within the transmission control system of heavy-duty construction machinery. This component sits at the interface between the valve body and the actuator lines, ensuring reliable signal transmission for clutch and brake engagement. The SKU 4475.280.213 is manufactured to ZF’s exacting tolerances, providing a leak-proof seal that maintains consistent pressure across the transmission’s operating range. When paired with a 2093109002: DIFFERENTIAL, this connecting socket ensures that torque distribution remains stable even under extreme load conditions.

Symptoms of Failure

• Hydraulic fluid seepage at the connection point: A worn connecting socket often manifests as slow oil weeping around the fitting, leading to gradual pressure loss and eventual transmission overheating.
• Delayed gear engagement or harsh shifting: When the socket loses its sealing integrity, the transmission may exhibit sluggish response times or abrupt clutch application, particularly in low-range gears.
• Erratic pressure readings on diagnostic tools: Technicians frequently observe fluctuating line pressures that fail to stabilize, indicating internal leakage through the degraded socket bore.
• Visible corrosion or cracking on the socket body: Exposure to high-temperature hydraulic oil and road debris can cause the socket’s outer casing to develop stress fractures, compromising the entire control circuit.

Technical Specifications

Compatibility

This connecting socket is engineered for integration with ZF’s WG series powershift transmissions commonly found in wheel loaders, graders, and dump trucks. It is directly compatible with the WG180, WG200, and WG250 transmission models. The socket also interfaces with the 0750117075: TAPER ROLLER BEARING assembly, which supports the main shaft’s axial loads. For differential applications, this part works in conjunction with the 2093209095: DIFFERENTIAL and the 2093309071: DIFF.HOUSING to maintain proper oil routing within the final drive assembly.

Related Components

Frequently Asked Questions

Q: How do I know if the 4475.280.213 connecting socket is the correct replacement for my ZF transmission?
A: Verify your transmission model number (WG180, WG200, or WG250) and inspect the existing socket for the stamped part number. This socket is a direct OEM replacement and does not require adapter fittings.

Q: Can a worn connecting socket cause transmission overheating?
A: Yes. A degraded socket allows hydraulic fluid to bypass the intended circuit, reducing lubrication flow to critical components like the 0750117075: TAPER ROLLER BEARING. This friction increase often leads to elevated operating temperatures.

Q: Should I replace the O-ring seal when installing this socket?
A: Absolutely. ZF recommends always fitting a new O-ring (sold separately) to guarantee a leak-free connection. Reusing the old seal can compromise the socket’s pressure rating.